08-03-2024, 06:30 AM
I did this one recently.
Put your transparent (alpha channel) png layer at the bottom of the stack and then Filters > Animation > Overlay background.
All layers must be viewable. It's hard modifying gifs that are really messy. A lot are made using 'combine layers' or 'combine backgrounds' and they are not a clean image sequence. Also they are often Image > Mode > indexed and that makes them hard to manipulate.
If you have web space somewhere I recommend exporting as webp and linking from there.
Put your transparent (alpha channel) png layer at the bottom of the stack and then Filters > Animation > Overlay background.
All layers must be viewable. It's hard modifying gifs that are really messy. A lot are made using 'combine layers' or 'combine backgrounds' and they are not a clean image sequence. Also they are often Image > Mode > indexed and that makes them hard to manipulate.
If you have web space somewhere I recommend exporting as webp and linking from there.